Siux Electra ST3 Stupa Pro 2024

Technologies

Pros

• ✓The 20x40 Textreme 15K face barely flexes on contact: flat smashes and smashes by 3 come off with a clean, no-delay trajectory, and the arm gets razor-sharp feedback on exactly where the ball hit The sandy finish grips the ball just enough to make cross-court viboras and cut smashes bounce unpredictably without having to muscle the wrist The medium balance keeps this racket manageable in fast net exchanges: quick-fire volleys and low-hand defenses at the net don't lag behind, even at the top end of the 375g weight range The aramid in the 38mm tubular frame strips out most of the parasitic vibration from the EVA Hard core, which you'll appreciate in long sessions and on off-center hits toward the throat

Cons

• ✗Ball exit is the weakest link here: deep defense and lobs from the back need a full arm swing, because the EVA Hard core gives nothing back on its own The sweet spot on a teardrop this stiff is unforgiving; low hits near the throat come out short and feel like hitting a plank With a cold rubber, the first warm-up balls feel flat — this racket needs match-level intensity to unlock the power inside it The 355-375g range leaves little room for anyone chasing a lighter racket for back-to-back tournament matches

The Siux Electra ST3 Stupa Pro 2024 is designed for competition or pro-level players who prioritise performance and precision over comfort. Its teardrop shape shifts the sweet spot slightly upwards, striking a balance between control and power. The medium balance keeps a balanced behaviour between baseline shots and volleys. Its 355-375g weight range places it in the medium-weight group, the most common among amateur players.

Franco Stupaczuk puts his name on the Siux Electra ST3 Stupa Pro 2024, a 355-375g teardrop racket built with a 20x40 Textreme 15K carbon face, an EVA Hard core and a 38mm tubular frame in 3K carbon with aramid. None of those ingredients are designed to forgive mistakes.

It's the flagship of the Electra Pro line tied to the Argentine star, one of the biggest names on the pro tour, and its whole approach lines up with that pedigree: versatile on paper, demanding in hand.

Textreme 15K 20x40: why this weave changes the feel

The 20x40 designation points to an asymmetric weave, with a different thread count running in each direction across the face. The result is a surface that distributes stiffness unevenly and barely deforms on impact.

On court that shows up in two ways. Ball exit is instant, almost simultaneous with contact. And the arm gets an extremely precise readout of exactly where you struck the ball — for better or worse.

The EVA Hard core acts as a second filter. It's a dry, unforgiving rubber that only opens up when the racket head is moving fast. Players with real arm speed get a direct response; players who guide the ball run into a wall.

The 3K carbon tubular frame with aramid

Aramid in a 38mm profile does one specific job: soak up vibration without softening the response. It's the answer to a real problem with stiff-faced, hard-rubber rackets, which tend to punish the elbow on off-center hits.

Pairing that with 3K carbon in the tubular frame delivers structural strength exactly where a teardrop racket takes the most stress — the base of the throat. The feel stays firm, but parasitic vibration gets cut off halfway through.

How does the Siux Electra ST3 Stupa Pro play on smashes, bandejas and defense?

Flat smashes and smashes by 3. This is where the racket is most at home. The heavier end of the weight range combined with the stiff face drives the ball on a clean trajectory, and the shot feels solid and blocky rather than whippy.

Bandeja and vibora. The medium balance lets you reach the contact point without the lag typical of a head-heavy racket. The sandy finish grips just enough for a cut cross-court vibora to bounce unpredictably without forcing the wrist.

Volleys. Strong performance in quick net exchanges: the racket responds well on the second volley and doesn't fall behind on low-hand shots.

Defense and off-the-back-wall shots. This is where the racket asks something back. Ball exit is the most subdued part of the package, and lobs from the back require a full arm swing and real follow-through. With a dead ball tight against the glass, the EVA Hard core won't hand you any extra depth.

What level of player is this Siux racket built for?

Competition-level players with solid technique and genuine arm speed. The Siux Electra ST3 Stupa Pro needs high match intensity to unlock its power: with a guided swing or a slower arm, the hard rubber and stiff face produce a muted response and a sweet spot that's tough to find.

Siux Electra ST3 Stupa Pro 2024 specs

The player profile that gets the most out of this racket

1. **Attacking backhand players.** The teardrop shape puts mass up top and rewards players who step in to smash rather than wait for an unforced error.
2. **Fast, clean hitters.** The sweet spot isn't generous; low contact near the throat comes out short and feels like hitting a plank.
3. **High-intensity matches.** On slow balls the racket gives you little; it's in demanding rallies that the Textreme face starts to pay off.
4. **A balanced pairing.** Works well alongside a partner using a racket with more generous ball exit, one that can sustain the point while this one looks to finish it.

Verdict: firmness in exchange for effort

This Siux racket delivers power and control in fairly equal measure, but it charges its price on defense. It's a racket that gives back exactly what you put into it, without correcting anything on its own.

If you're coming from a racket with a soft rubber and looking for more precision on your smash, the change in feel will hit hard in the first few sessions. If you already play with a hard EVA core and want a teardrop that's more manageable at net than a classic diamond, the medium balance of the Electra ST3 Stupa Pro fits the bill.

What you shouldn't expect from it: comfort on defense, forgiveness on off-center hits, or help on the long lob. Everything else is down to the player.